Barometric pressure and temperature sensor polling example
Overview
This sample application periodically reads the sensor temperature and pressure, displaying the values on the console along with a timestamp since startup. It also displays the estimated altitude if floating point is supported and the sensor provides altitude data.
Wiring
This sample uses an external breakout for the sensor. A devicetree overlay must be provided to identify the I2C/SPI used to control the sensor.
Building and Running
This sample supports pressure sensor devices. Device needs
to be aliased as pressure-sensor. For example:
/ {
aliases {
pressure-sensor = &icp201xx;
};
};
Make sure the aliases are in devicetree, then build and run with:
# From the root of the zephyr repository
west build -b nrf52dk/nrf52832 samples/sensor/pressure_polling
west flash
Sample Output
## Default configuration
Found device “icp101xx@63”, getting sensor data Starting pressure and altitude polling sample. temp 25.49 Cel, pressure 96.271438 kPa, altitude 447.208465 m temp 25.50 Cel, pressure 96.271331 kPa, altitude 447.234161 m temp 25.49 Cel, pressure 96.266685 kPa, altitude 447.636077 m temp 25.50 Cel, pressure 96.267951 kPa, altitude 447.537078 m temp 25.51 Cel, pressure 96.268577 kPa, altitude 447.488281 m temp 25.50 Cel, pressure 96.269340 kPa, altitude 447.414978 m temp 25.50 Cel, pressure 96.268562 kPa, altitude 447.473663 m temp 25.50 Cel, pressure 96.267341 kPa, altitude 447.596496 m
<repeats endlessly>